and my Internet traffic which is otherwise limited (250gb) per month has been spent after 18-20 days in a month (not just this month) and my mail' paswords are changed and I can't open them.Is it possible that I'm being "hacked'' or what ever is the word!
Yes it is very possible. You may have a virus/malware on your computer that is sending and receiving data, which could explain your high usage. It may also include a keylogger which could explain how they took over your email.
And once they have control of your email box they might be able to have your online bank password reset if they know your account. Also if you use your Credit cards online they may have captured that information as well.
I am not saying all this has happened but you should not wait to find out. If you use your computer for home banking I suggest you contact your bank and credit card companies to cancel and reissue your cards and start watching for odd charges/withdrawals. If you use eBay and Paypal you should contact them as well.
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The program you are trying to load, is that the Malwarebytes program that I suggested? If you are infected, many viruses actively try to block malwarebytes installation.
Here is the forum tutorial on how to take a screenshot.
Then to post it here you hit the
Go Advanced Button. Then click the Paperclip Icon and Browse for the JPG file you saved. Click Upload. Close that window once you've uploaded all the pictures. The pictures will automatically be added to the bottom of your post or you can position them by using the downward triangle to the right of the paperclip.